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2x - 2y = -10
3x + 2y = 15
Suma:
5x = 5
x = 1
Si X = 1 ; Y = 6 (reemplazando)
b) Hacemos lo mismo que el problema anterior, pero con el "b":
4a + 2b = 18
a - 2b = -8
Suma:
5a = 10
a = 2
Si a = 2 ; b = 5